/**
 * includes()方法用于判断当前数组是否包含指定的值，如果是，则返回true,否则返回false
 */

var arr = [1, 2, 3, 4, 5].includes(2);//true
var arr1 = [1, 2, 3, 4, 6].includes(5);//false
console.log(arr + "=========" + arr1);